WOW!!! Nice, and looks very clean too, Also, if space and codes permit, maybe you should think of putting a second story on it for a few bucks more. I wish I had, on mine. You could store your planes on the second level, provided you have good fan/air ventilation. Plastc components deteriorate(get brittle) quickly in attics(HEAT kills)! Good luck to you and 5 years is a great time to start the planning. A well planned and budgeted structure will make you happier when it is finished. Did you say how many square feet it is? Take care,,,,,,,, Scott.